<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .nod{
            list-style-type: none;
            padding: 0;
        }
        #kill{
            background: black;
            width: 200px;
            height: 300px;
            color: white;
        }
        .gsi{
            width: 100%;
            height: 50px;
            border: 1px solid white;
            text-align: center;
            line-height: 50px;
        }
        li{
            width: 200px;;
            height: 30px;
            border: 1px solid red;
            text-align: center;
            line-height: 30px;
        }
        .disappear{
            display: none;
        }
    </style>
</head>
<body>
<div id="kill">
    <div id="one" class="gsi">菜单一
    </div>
    <ul class="nod disappear">
        <li>一</li>
        <li>二</li>
        <li>三</li>
    </ul>
    <div id="two" class="gsi">菜单二
    </div>
    <ul class="nod disappear">
        <li>一</li>
        <li>二</li>
        <li>三</li>
    </ul>
    <div id="three" class="gsi">菜单三
    </div>
    <ul class="nod disappear">
        <li>一</li>
        <li>二</li>
        <li>三</li>
    </ul>
</div>

<script src="jquery.js"></script>
<script>
    $(".gsi").click(function(){
        $(this).next().toggleClass("disappear").siblings(".nod").addClass("disappear");
    })
</script>
</body>
</html>